Overall, the procedure went well. I used a 00 screwdriver for all the screws and I didn't have any problem. When I reassembled the rear cover, only one screw on the left side wouldn't go in easy (the other ones did) but it went in with a little pressure. I used a spunger to get the battery cable off. I rocked the cable head back and forth from the sides without forcing it and it came off. The first RAM chip came out fine. I had a bit of a problem getting the second one out. I had to use the spunger again for the bottom chip and positioned it under the chip and lightly rocked it from one side to another and it finally popped out. Don't use any force when doing anything! I actually had some problems getting the new RAM out of the packaging. I suggest that you do that BEFORE you start. Finally, getting the top RAM in had me a bit bewildered for a second. However, I took my time and got it in where it belonged. I put back the back cover and only put in two screws to test it. Success! Macbook 2009 mid model FYI